Phase reconstruction in a speech decoder

One or more non-transitory computer-readable media having stored thereon encoded data as part of a bitstream, the encoded data being organized to facilitate decoding to reconstruct speech by performing operations comprising:

• decoding residual values, including:
• decoding a sparseness value and correlation values;
• decoding one or more sets of magnitude values;
• decoding a set of phase values;
• and
• reconstructing the residual values, including:
• reconstructing complex amplitude values for one or more subframes of a current frame using the one or more sets of magnitude values and the set of phase values;
• applying an inverse frequency transform to the complex amplitude values for the respective subframes;
• and
• selectively adding noise to the residual values based at least in part on the correlation values and the sparseness value;
• and
• filtering the residual values according to linear prediction coefficients;
• and
• storing the reconstructed speech for output.

One or more non-transitory computer-readable media having stored thereon computer-executable instructions for causing one or more processing units, when programmed thereby, to perform operations comprising:

• receiving speech input;
• encoding the speech input to produce encoded data, including:
• filtering input values based on the speech input according to linear prediction coefficients, thereby producing residual values;
• and
• encoding the residual values, including:
• determining a set of phase values;
• and
• encoding the set of phase values, wherein at least some of the set of phase values are represented using a weighted sum of basis functions;
• and
• storing the encoded data for output as part of a bitstream.